v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v See Chapter 4, “Parts listing, Type 7377 server,” on page 125 to determine which components are
customer replaceable units (CRU) and which components are field replaceable units (FRU).
v If an action step is preceded by “(Trained service technician only),” that step must be performed only by a
trained service technician.
Component LED Description Action
Microprocessor error
LED
Microprocessor has failed, is
missing, or has been incorrectly
installed.
1. Check the system event log to determine the
reason for the lit LED.
2. (Trained service technician) Reseat the failing
microprocessor
3. Replace the following components one at a time,
in the order shown, restarting the server each time:
a. (Trained service technician only) Failing
microprocessor
b. (Trained service technician only) System board
Note: Make sure the technician refreshes the
VPD.
Microprocessor
mismatch LED
An invalid microprocessor
configuration or a microprocessor
has failed
1. Check that microprocessor 1 is installed.
2. Check the microprocessors are compatible with
each other (see “Installing a microprocessor and
heat sink” on page 223 for additional information
about microprocessor requirements) and use the
Setup utility and select System Information →
System Summary → Processor Details to verify
the microprocessors information.
3. (Trained service technician only) Replace the
incompatible microprocessor.
4. Check the system-error logs for information about
the error. Replace any components that are
identified in the error log.
System-board error
LED
System-board CPU VRD and/or
power voltage regulators have failed
and/or system-board cannot power
on.
(Trained service technician only) Replace the system
board.
Note: Make sure the technician refreshes the VPD.
Battery error LED Battery low.
1. Replace the CMOS lithium battery, if necessary.
2. (Trained service technician only) Replace the
system board.
Note: Make sure the technician refreshes the
VPD.
H8 heartbeat LED Indicates the status of power-on and
power-off sequencing.
(Trained service technician only) If the server is
connected to power and the LED is not flashing,
replace the system board.
Note: Make sure the technician refreshes the VPD.
56 IBM System x3630 M3 Type 7377: Problem Determination and Service Guide
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